AsteriskNow: Block Incoming Numbers By Area Code 1

AsteriskNow: Block Incoming Numbers By Area Code
I use AsteriskNow for my work phone system.  One annoyance I ran into was repeated fax spam.  I don’t use the fax features on AsterskNow, but every time my voicemail picked up a call from these numbers, I would receive a voicemail full of fax beeps.  I started adding the numbers to my blacklist, but ...